Inconsistent Air Sacs

[christylynne11]

I have 26 duck eggs in my incubator, but I had to start lockdown 2 days early because a lot of them have already internally pipped. There are 3 different breeds in the bator (Ancona, Rouen, and Cayuga). The Rouens always hatch first. With 3 different breeds, they usually hatch over a 4 day span. Anyway, I noticed when I put them on lockdown that some of the air sacs are very large whereas others are very small. This occurred in all 3 breeds. What do you do when you have varying levels of air sac size and need to increase the size of some, but not others, at lockdown?? I only have one incubator.

 

[Knighstar679]

Could some have already started the drawdown?

 

[christylynne11]

The ones that internally pipped have. But of the ones that haven't, some of them have an air sac the size of day 7 whereas others are the appropriate size for day 28. They are currently at day 23. I raised my temp by half a degree this time and incubated at 100 because the last batch hatched on days 29-32 at 99.5.

 

[Knighstar679]

Oh boy that’s a bit out of my knowledge range. Maybe @casportpony @WVduckchick or @Texas Kiki might have some good advice.

 

[Kiki]

I would focus on the externally pipped eggs at this point.
Keep the bator good for them.

It's possible the others have quit?

 

[christylynne11]

Every one of them still has movement. I tossed the 2 bad eggs in weeks 1 and 2.

 

[christylynne11]

I had 15 of 17 eggs make it to lockdown last time, and only 1 quit during lockdown. 1 other required assistance. None of those had especially small air sacs during the last 2 weeks. Idk, I guess I'll just have to wait and see what happens.

 

[chickens really]

Then something isn't right in the incubator..Humidity isn't even.

 

[christylynne11]

Then something isn't right in the incubator..Humidity isn't even.

Hmmm. That seems obvious, but I kept all of the eggs in the center on the bator and moved the eggs from the outer edge to the middle at every rotation.

 

[chickens really]

Hmmm. That seems obvious, but I kept all of the eggs in the center on the bator and moved the eggs from the outer edge to the middle at every rotation.

Well only thing I can think of if air cells are not the same. All eggs hatch the same..